Berlin wool

Berlin \Ber"lin\, n. [The capital of Germany]
   1. A four-wheeled carriage, having a sheltered seat behind
      the body and separate from it, invented in the 17th
      century, at Berlin.
      [1913 Webster]

   2. Fine worsted for fancy-work; zephyr worsted; -- called
      also {Berlin wool}.
      [1913 Webster]

   {Berlin black}, a black varnish, drying with almost a dead
      surface; -- used for coating the better kinds of ironware.
      --Ure.

   {Berlin blue}, Prussian blue. --Ure.

   {Berlin green}, a complex cyanide of iron, used as a green
      dye, and similar to Prussian blue.

   {Berlin iron}, a very fusible variety of cast iron, from
      which figures and other delicate articles are
      manufactured. These are often stained or lacquered in
      imitation of bronze.

   {Berlin shop}, a shop for the sale of worsted embroidery and
      the materials for such work.

   {Berlin work}, worsted embroidery.
      [1913 Webster] Berm